package com.wl.thread.demo02;

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.concurrent.*;

public class TestCallable implements Callable<Boolean> {
    //网络图片地址
    private String url;
    //保存文件名称
    private String name;

    public TestCallable(String url,String name){
        this.url = url;
        this.name = name;
    }
    @Override
    public Boolean call() {
        WebDownloaderCallable webDownloaderRunnable = new WebDownloaderCallable();
        webDownloaderRunnable.downloader(url,name);
        System.out.println("下载文件名为:"+name);
        return true;
    }

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        TestCallable t1 = new TestCallable("https://gitee.com/carrywl/image-hosting/raw/master/image-codeStudy/avatar.jpeg","1.jpg");
        TestCallable t2 = new TestCallable("https://gitee.com/carrywl/image-hosting/raw/master/image-codeStudy/weChat-Code.jpg","2.jpg");
        TestCallable t3 = new TestCallable("https://gitee.com/carrywl/image-hosting/raw/master/image-codeStudy/QQ图片20200809153256.jpg","3.jpg");

        //创建执行服务
        ExecutorService ser = Executors.newFixedThreadPool(3);
        //提交执行
        Future<Boolean> r1 = ser.submit(t1);
        Future<Boolean> r2 = ser.submit(t2);
        Future<Boolean> r3 = ser.submit(t3);
        //获取结果
        boolean rs1 = r1.get();
        boolean rs2 = r2.get();
        boolean rs3 = r3.get();
        //关闭服务
        ser.shutdownNow();
    }
}

/**
 * 下载器
 */
class WebDownloaderCallable{
    //下载方法
    public void downloader(String url,String name){
        try {
            FileUtils.copyURLToFile(new URL(url),new File(name));
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("IO异常,downloader方法出现问题");
        }
    }
}
